PACBO: Clustering Online Datasets

A function for clustering online datasets. The number
of cells is data-driven which need not to be chosen in advance by the user.
The method is introduced and fully described in Le Li, Benjamin Guedj and Sebastien Loustau (2016), "PAC-Bayesian Online Clustering" (arXiv preprint: <https://arxiv.org/abs/1602.00522>).